./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:40:50,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:40:50,140 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:40:50,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:40:50,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:40:50,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:40:50,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:40:50,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:40:50,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:40:50,171 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:40:50,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:40:50,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:40:50,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:40:50,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:40:50,172 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:40:50,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:40:50,173 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:40:50,174 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:40:50,174 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:40:50,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:40:50,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:40:50,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:40:50,176 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:40:50,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:40:50,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:40:50,177 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-11-24 01:40:50,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:40:50,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:40:50,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:40:50,493 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:40:50,493 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:40:50,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-24 01:40:53,476 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/data/28812acde/3949a3a3a9bd494c98dc436de75ad453/FLAG03cf91b82 [2024-11-24 01:40:53,789 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:40:53,793 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-24 01:40:53,812 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/data/28812acde/3949a3a3a9bd494c98dc436de75ad453/FLAG03cf91b82 [2024-11-24 01:40:53,831 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/data/28812acde/3949a3a3a9bd494c98dc436de75ad453 [2024-11-24 01:40:53,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:40:53,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:40:53,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:40:53,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:40:53,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:40:53,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:40:53" (1/1) ... [2024-11-24 01:40:53,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5395310d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:53, skipping insertion in model container [2024-11-24 01:40:53,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:40:53" (1/1) ... [2024-11-24 01:40:53,863 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:40:54,049 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-24 01:40:54,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:40:54,069 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:40:54,084 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-24 01:40:54,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:40:54,100 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:40:54,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54 WrapperNode [2024-11-24 01:40:54,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:40:54,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:40:54,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:40:54,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:40:54,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,131 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-11-24 01:40:54,131 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:40:54,132 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:40:54,132 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:40:54,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:40:54,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,154 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-24 01:40:54,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,154 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,157 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:40:54,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:40:54,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:40:54,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:40:54,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (1/1) ... [2024-11-24 01:40:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:40:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:40:54,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:40:54,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:40:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:40:54,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:40:54,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:40:54,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:40:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:40:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:40:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 01:40:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 01:40:54,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:40:54,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:40:54,243 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:40:54,357 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:40:54,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:40:54,511 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:40:54,511 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:40:54,678 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:40:54,678 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-24 01:40:54,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:40:54 BoogieIcfgContainer [2024-11-24 01:40:54,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:40:54,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:40:54,684 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:40:54,698 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:40:54,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:40:53" (1/3) ... [2024-11-24 01:40:54,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5974eba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:40:54, skipping insertion in model container [2024-11-24 01:40:54,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:40:54" (2/3) ... [2024-11-24 01:40:54,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5974eba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:40:54, skipping insertion in model container [2024-11-24 01:40:54,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:40:54" (3/3) ... [2024-11-24 01:40:54,701 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-11-24 01:40:54,724 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:40:54,726 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-24 01:40:54,726 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:40:54,806 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:40:54,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-24 01:40:54,920 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-24 01:40:54,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:40:54,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-24 01:40:54,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-24 01:40:54,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-24 01:40:54,953 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:40:54,976 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@634ac64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:40:54,976 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-24 01:40:54,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:40:54,996 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-24 01:40:54,996 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:40:54,996 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:40:55,001 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:40:55,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:40:55,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:40:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1480051232, now seen corresponding path program 1 times [2024-11-24 01:40:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:40:55,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356359815] [2024-11-24 01:40:55,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:40:55,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:40:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:40:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:55,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:40:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356359815] [2024-11-24 01:40:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356359815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:40:55,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:40:55,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:40:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602758202] [2024-11-24 01:40:55,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:40:55,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:40:55,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:40:55,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:40:55,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:40:55,488 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-24 01:40:55,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:55,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:40:55,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-24 01:40:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:40:55,651 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-11-24 01:40:55,652 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-24 01:40:55,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-11-24 01:40:55,659 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-24 01:40:55,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-11-24 01:40:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:40:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:40:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-24 01:40:55,686 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-24 01:40:55,688 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-11-24 01:40:55,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-11-24 01:40:55,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:40:55,701 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-24 01:40:55,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-24 01:40:55,708 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-24 01:40:55,709 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-24 01:40:55,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:55,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:40:55,710 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:40:55,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:40:55,710 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:40:55,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:40:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1348133238, now seen corresponding path program 1 times [2024-11-24 01:40:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:40:55,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158314140] [2024-11-24 01:40:55,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:40:55,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:40:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:40:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:40:55,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:40:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158314140] [2024-11-24 01:40:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158314140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:40:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:40:55,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:40:55,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313348801] [2024-11-24 01:40:55,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:40:55,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:40:55,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:40:55,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:40:55,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:40:55,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-24 01:40:55,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:55,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:40:55,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-24 01:40:55,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:40:56,134 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-11-24 01:40:56,134 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-24 01:40:56,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 617 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-11-24 01:40:56,137 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-24 01:40:56,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-11-24 01:40:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:40:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:40:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-24 01:40:56,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-24 01:40:56,139 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-11-24 01:40:56,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-11-24 01:40:56,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:40:56,140 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-24 01:40:56,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-24 01:40:56,142 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-24 01:40:56,142 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-24 01:40:56,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:56,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:40:56,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:40:56,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:40:56,143 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:40:56,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:40:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1876461988, now seen corresponding path program 1 times [2024-11-24 01:40:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:40:56,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951320009] [2024-11-24 01:40:56,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:40:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:40:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:40:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:40:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951320009] [2024-11-24 01:40:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951320009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:40:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466651572] [2024-11-24 01:40:56,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:40:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:40:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:40:56,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:40:56,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:40:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:40:56,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:40:56,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:40:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:56,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:40:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466651572] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:40:56,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:40:56,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-11-24 01:40:56,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052816614] [2024-11-24 01:40:56,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:40:56,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:40:56,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:40:56,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:40:56,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:40:56,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-24 01:40:56,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:56,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:40:56,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-24 01:40:56,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:40:57,168 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-11-24 01:40:57,168 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-24 01:40:57,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1142 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-11-24 01:40:57,174 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-11-24 01:40:57,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-11-24 01:40:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:40:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:40:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-24 01:40:57,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-11-24 01:40:57,178 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-11-24 01:40:57,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-11-24 01:40:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:40:57,183 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-11-24 01:40:57,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-24 01:40:57,185 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-11-24 01:40:57,185 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-11-24 01:40:57,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:57,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:40:57,186 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:40:57,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:40:57,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:40:57,390 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:40:57,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:40:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash -348810224, now seen corresponding path program 2 times [2024-11-24 01:40:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:40:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245309057] [2024-11-24 01:40:57,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:40:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:40:57,414 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:40:57,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:40:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:57,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:40:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245309057] [2024-11-24 01:40:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245309057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:40:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634567449] [2024-11-24 01:40:57,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:40:57,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:40:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:40:57,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:40:57,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:40:57,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:40:57,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:40:57,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 01:40:57,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:40:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:57,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:40:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634567449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:40:58,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:40:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-24 01:40:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154125781] [2024-11-24 01:40:58,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:40:58,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:40:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:40:58,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:40:58,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:40:58,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:40:58,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:58,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:40:58,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:40:58,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:40:58,278 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-11-24 01:40:58,279 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-24 01:40:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2184 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-11-24 01:40:58,286 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-11-24 01:40:58,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-11-24 01:40:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:40:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:40:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-24 01:40:58,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-24 01:40:58,288 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-11-24 01:40:58,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-11-24 01:40:58,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 01:40:58,292 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-11-24 01:40:58,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-11-24 01:40:58,293 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-11-24 01:40:58,293 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-11-24 01:40:58,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:58,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:40:58,293 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:40:58,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:40:58,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:40:58,498 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:40:58,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:40:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1995159394, now seen corresponding path program 3 times [2024-11-24 01:40:58,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:40:58,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428313678] [2024-11-24 01:40:58,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:40:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:40:58,515 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:40:58,515 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:40:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:58,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:40:58,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428313678] [2024-11-24 01:40:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428313678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:40:58,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227333686] [2024-11-24 01:40:58,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:40:58,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:40:58,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:40:58,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:40:58,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:40:58,772 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:40:58,772 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:40:58,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:40:58,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:40:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:59,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:40:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:40:59,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227333686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:40:59,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:40:59,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 20 [2024-11-24 01:40:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321835845] [2024-11-24 01:40:59,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:40:59,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:40:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:40:59,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:40:59,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:40:59,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:40:59,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:40:59,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:40:59,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:40:59,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:00,882 INFO L124 PetriNetUnfolderBase]: 627/1078 cut-off events. [2024-11-24 01:41:00,882 INFO L125 PetriNetUnfolderBase]: For 1759/1759 co-relation queries the response was YES. [2024-11-24 01:41:00,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1078 events. 627/1078 cut-off events. For 1759/1759 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4720 event pairs, 3 based on Foata normal form. 29/1107 useless extension candidates. Maximal degree in co-relation 2364. Up to 211 conditions per place. [2024-11-24 01:41:00,891 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 118 selfloop transitions, 97 changer transitions 23/239 dead transitions. [2024-11-24 01:41:00,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 239 transitions, 1673 flow [2024-11-24 01:41:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-24 01:41:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-24 01:41:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 321 transitions. [2024-11-24 01:41:00,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40225563909774437 [2024-11-24 01:41:00,896 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 38 states and 321 transitions. [2024-11-24 01:41:00,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 239 transitions, 1673 flow [2024-11-24 01:41:00,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 1665 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-24 01:41:00,909 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1096 flow [2024-11-24 01:41:00,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1096, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-11-24 01:41:00,910 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 71 predicate places. [2024-11-24 01:41:00,910 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1096 flow [2024-11-24 01:41:00,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:00,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:00,910 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:00,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:41:01,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:01,114 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:01,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash 137408708, now seen corresponding path program 4 times [2024-11-24 01:41:01,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:01,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256817097] [2024-11-24 01:41:01,115 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:41:01,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:01,126 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:41:01,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:01,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:01,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256817097] [2024-11-24 01:41:01,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256817097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137488738] [2024-11-24 01:41:01,225 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:41:01,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:01,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:01,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:41:01,279 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:41:01,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:01,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:41:01,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:01,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:01,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137488738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:01,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-24 01:41:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042955147] [2024-11-24 01:41:01,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:01,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:41:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:01,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:41:01,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:41:01,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:01,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1096 flow. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:01,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:01,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:01,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:02,132 INFO L124 PetriNetUnfolderBase]: 889/1517 cut-off events. [2024-11-24 01:41:02,132 INFO L125 PetriNetUnfolderBase]: For 15379/15379 co-relation queries the response was YES. [2024-11-24 01:41:02,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 1517 events. 889/1517 cut-off events. For 15379/15379 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7194 event pairs, 69 based on Foata normal form. 71/1588 useless extension candidates. Maximal degree in co-relation 7185. Up to 391 conditions per place. [2024-11-24 01:41:02,152 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 129 selfloop transitions, 135 changer transitions 0/265 dead transitions. [2024-11-24 01:41:02,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 3003 flow [2024-11-24 01:41:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:41:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 01:41:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 153 transitions. [2024-11-24 01:41:02,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-11-24 01:41:02,154 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1096 flow. Second operand 16 states and 153 transitions. [2024-11-24 01:41:02,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 3003 flow [2024-11-24 01:41:02,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 265 transitions, 2778 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-11-24 01:41:02,201 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 2204 flow [2024-11-24 01:41:02,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2204, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-11-24 01:41:02,202 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2024-11-24 01:41:02,202 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 2204 flow [2024-11-24 01:41:02,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:02,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:02,203 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:02,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 01:41:02,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 01:41:02,404 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:02,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -765577430, now seen corresponding path program 5 times [2024-11-24 01:41:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:02,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597304434] [2024-11-24 01:41:02,405 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:41:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:02,417 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:41:02,417 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:02,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597304434] [2024-11-24 01:41:02,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597304434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502294854] [2024-11-24 01:41:02,530 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:41:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:02,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:02,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:41:02,594 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:41:02,595 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:02,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:41:02,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:02,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:02,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502294854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:02,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:02,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-24 01:41:02,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332175966] [2024-11-24 01:41:02,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:02,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:41:02,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:02,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:41:02,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:41:02,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:02,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 2204 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:02,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:02,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:02,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:04,556 INFO L124 PetriNetUnfolderBase]: 1412/2417 cut-off events. [2024-11-24 01:41:04,557 INFO L125 PetriNetUnfolderBase]: For 39715/39715 co-relation queries the response was YES. [2024-11-24 01:41:04,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2417 events. 1412/2417 cut-off events. For 39715/39715 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12901 event pairs, 42 based on Foata normal form. 57/2474 useless extension candidates. Maximal degree in co-relation 12848. Up to 451 conditions per place. [2024-11-24 01:41:04,587 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 172 selfloop transitions, 287 changer transitions 6/466 dead transitions. [2024-11-24 01:41:04,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 466 transitions, 6341 flow [2024-11-24 01:41:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-24 01:41:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-24 01:41:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 345 transitions. [2024-11-24 01:41:04,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-24 01:41:04,590 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 2204 flow. Second operand 40 states and 345 transitions. [2024-11-24 01:41:04,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 466 transitions, 6341 flow [2024-11-24 01:41:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 466 transitions, 6039 flow, removed 151 selfloop flow, removed 0 redundant places. [2024-11-24 01:41:04,710 INFO L231 Difference]: Finished difference. Result has 179 places, 335 transitions, 5034 flow [2024-11-24 01:41:04,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5034, PETRI_PLACES=179, PETRI_TRANSITIONS=335} [2024-11-24 01:41:04,711 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 156 predicate places. [2024-11-24 01:41:04,711 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 335 transitions, 5034 flow [2024-11-24 01:41:04,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:04,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:04,711 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:04,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:41:04,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 01:41:04,912 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:04,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1039971358, now seen corresponding path program 6 times [2024-11-24 01:41:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:04,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479710999] [2024-11-24 01:41:04,914 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:41:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:04,923 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:41:04,923 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:05,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479710999] [2024-11-24 01:41:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479710999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107683309] [2024-11-24 01:41:05,051 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:41:05,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:05,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:05,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:41:05,105 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:41:05,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:05,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:41:05,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:05,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107683309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:05,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-24 01:41:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682656465] [2024-11-24 01:41:05,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:05,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:41:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:05,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:41:05,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:41:05,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:05,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 335 transitions, 5034 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:05,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:05,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:05,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:07,318 INFO L124 PetriNetUnfolderBase]: 1815/3055 cut-off events. [2024-11-24 01:41:07,318 INFO L125 PetriNetUnfolderBase]: For 92812/92812 co-relation queries the response was YES. [2024-11-24 01:41:07,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26501 conditions, 3055 events. 1815/3055 cut-off events. For 92812/92812 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16059 event pairs, 65 based on Foata normal form. 26/3081 useless extension candidates. Maximal degree in co-relation 23640. Up to 561 conditions per place. [2024-11-24 01:41:07,385 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 231 selfloop transitions, 367 changer transitions 3/602 dead transitions. [2024-11-24 01:41:07,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 602 transitions, 10707 flow [2024-11-24 01:41:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 01:41:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-24 01:41:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 274 transitions. [2024-11-24 01:41:07,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-11-24 01:41:07,388 INFO L175 Difference]: Start difference. First operand has 179 places, 335 transitions, 5034 flow. Second operand 32 states and 274 transitions. [2024-11-24 01:41:07,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 602 transitions, 10707 flow [2024-11-24 01:41:07,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 602 transitions, 10073 flow, removed 297 selfloop flow, removed 6 redundant places. [2024-11-24 01:41:07,856 INFO L231 Difference]: Finished difference. Result has 217 places, 479 transitions, 8372 flow [2024-11-24 01:41:07,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8372, PETRI_PLACES=217, PETRI_TRANSITIONS=479} [2024-11-24 01:41:07,859 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2024-11-24 01:41:07,859 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 479 transitions, 8372 flow [2024-11-24 01:41:07,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:07,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:07,860 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:07,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:41:08,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-24 01:41:08,060 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:08,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2057945510, now seen corresponding path program 7 times [2024-11-24 01:41:08,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:08,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879821890] [2024-11-24 01:41:08,061 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:41:08,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:41:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:08,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879821890] [2024-11-24 01:41:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879821890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953060901] [2024-11-24 01:41:08,268 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:41:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:08,271 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:08,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:41:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:41:08,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:41:08,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:08,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953060901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:08,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:08,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-24 01:41:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499068226] [2024-11-24 01:41:08,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:08,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:41:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:08,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:41:08,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:41:08,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:08,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 479 transitions, 8372 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:08,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:08,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:08,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:11,711 INFO L124 PetriNetUnfolderBase]: 3156/5324 cut-off events. [2024-11-24 01:41:11,712 INFO L125 PetriNetUnfolderBase]: For 193192/193192 co-relation queries the response was YES. [2024-11-24 01:41:11,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48083 conditions, 5324 events. 3156/5324 cut-off events. For 193192/193192 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31034 event pairs, 25 based on Foata normal form. 148/5472 useless extension candidates. Maximal degree in co-relation 47065. Up to 1031 conditions per place. [2024-11-24 01:41:11,798 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 386 selfloop transitions, 704 changer transitions 5/1096 dead transitions. [2024-11-24 01:41:11,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1096 transitions, 20886 flow [2024-11-24 01:41:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-24 01:41:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-24 01:41:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 385 transitions. [2024-11-24 01:41:11,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39855072463768115 [2024-11-24 01:41:11,804 INFO L175 Difference]: Start difference. First operand has 217 places, 479 transitions, 8372 flow. Second operand 46 states and 385 transitions. [2024-11-24 01:41:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1096 transitions, 20886 flow [2024-11-24 01:41:12,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1096 transitions, 20009 flow, removed 347 selfloop flow, removed 9 redundant places. [2024-11-24 01:41:12,935 INFO L231 Difference]: Finished difference. Result has 277 places, 865 transitions, 17411 flow [2024-11-24 01:41:12,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17411, PETRI_PLACES=277, PETRI_TRANSITIONS=865} [2024-11-24 01:41:12,936 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 254 predicate places. [2024-11-24 01:41:12,936 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 865 transitions, 17411 flow [2024-11-24 01:41:12,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:12,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:12,937 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:12,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:41:13,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-24 01:41:13,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:13,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash 820682530, now seen corresponding path program 8 times [2024-11-24 01:41:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:13,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396177360] [2024-11-24 01:41:13,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:41:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:13,151 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:41:13,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:13,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:13,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396177360] [2024-11-24 01:41:13,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396177360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:13,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638158147] [2024-11-24 01:41:13,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:41:13,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:13,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:13,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:41:13,357 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:41:13,357 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:13,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:41:13,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:13,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638158147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:13,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-24 01:41:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642708513] [2024-11-24 01:41:13,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:13,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:41:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:13,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:41:13,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:41:13,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:13,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 865 transitions, 17411 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:13,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:13,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:13,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:18,033 INFO L124 PetriNetUnfolderBase]: 4418/7337 cut-off events. [2024-11-24 01:41:18,033 INFO L125 PetriNetUnfolderBase]: For 298832/298832 co-relation queries the response was YES. [2024-11-24 01:41:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75818 conditions, 7337 events. 4418/7337 cut-off events. For 298832/298832 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44879 event pairs, 132 based on Foata normal form. 36/7373 useless extension candidates. Maximal degree in co-relation 74325. Up to 1347 conditions per place. [2024-11-24 01:41:18,138 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 321 selfloop transitions, 1192 changer transitions 5/1519 dead transitions. [2024-11-24 01:41:18,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1519 transitions, 34654 flow [2024-11-24 01:41:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 01:41:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-24 01:41:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 362 transitions. [2024-11-24 01:41:18,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-11-24 01:41:18,141 INFO L175 Difference]: Start difference. First operand has 277 places, 865 transitions, 17411 flow. Second operand 44 states and 362 transitions. [2024-11-24 01:41:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1519 transitions, 34654 flow [2024-11-24 01:41:20,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1519 transitions, 33061 flow, removed 724 selfloop flow, removed 8 redundant places. [2024-11-24 01:41:20,752 INFO L231 Difference]: Finished difference. Result has 332 places, 1370 transitions, 31834 flow [2024-11-24 01:41:20,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16832, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=31834, PETRI_PLACES=332, PETRI_TRANSITIONS=1370} [2024-11-24 01:41:20,754 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2024-11-24 01:41:20,754 INFO L471 AbstractCegarLoop]: Abstraction has has 332 places, 1370 transitions, 31834 flow [2024-11-24 01:41:20,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:20,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:20,755 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:20,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 01:41:20,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:41:20,956 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:20,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1632791624, now seen corresponding path program 9 times [2024-11-24 01:41:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:20,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783978737] [2024-11-24 01:41:20,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:41:20,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:20,974 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:41:20,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:21,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:21,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783978737] [2024-11-24 01:41:21,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783978737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:21,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604891771] [2024-11-24 01:41:21,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:41:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:21,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:21,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:41:21,199 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:41:21,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:21,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:41:21,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:21,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:21,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604891771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:21,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:21,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-24 01:41:21,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169241717] [2024-11-24 01:41:21,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:21,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:41:21,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:21,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:41:21,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:41:21,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:21,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1370 transitions, 31834 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:21,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:21,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:21,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:27,723 INFO L124 PetriNetUnfolderBase]: 5014/8337 cut-off events. [2024-11-24 01:41:27,723 INFO L125 PetriNetUnfolderBase]: For 415659/415659 co-relation queries the response was YES. [2024-11-24 01:41:27,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94252 conditions, 8337 events. 5014/8337 cut-off events. For 415659/415659 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 51936 event pairs, 109 based on Foata normal form. 70/8407 useless extension candidates. Maximal degree in co-relation 94033. Up to 1520 conditions per place. [2024-11-24 01:41:27,891 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 345 selfloop transitions, 1333 changer transitions 3/1682 dead transitions. [2024-11-24 01:41:27,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1682 transitions, 42176 flow [2024-11-24 01:41:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 01:41:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-24 01:41:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 342 transitions. [2024-11-24 01:41:27,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-11-24 01:41:27,894 INFO L175 Difference]: Start difference. First operand has 332 places, 1370 transitions, 31834 flow. Second operand 41 states and 342 transitions. [2024-11-24 01:41:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1682 transitions, 42176 flow [2024-11-24 01:41:33,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1682 transitions, 40144 flow, removed 951 selfloop flow, removed 8 redundant places. [2024-11-24 01:41:33,531 INFO L231 Difference]: Finished difference. Result has 375 places, 1560 transitions, 39317 flow [2024-11-24 01:41:33,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=30005, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=39317, PETRI_PLACES=375, PETRI_TRANSITIONS=1560} [2024-11-24 01:41:33,533 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 352 predicate places. [2024-11-24 01:41:33,533 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 1560 transitions, 39317 flow [2024-11-24 01:41:33,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:33,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:33,533 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:33,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 01:41:33,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:33,734 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:33,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:33,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1772095420, now seen corresponding path program 10 times [2024-11-24 01:41:33,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:33,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924733495] [2024-11-24 01:41:33,735 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:41:33,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:33,743 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:41:33,744 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924733495] [2024-11-24 01:41:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924733495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:41:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780141279] [2024-11-24 01:41:33,820 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:41:33,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:41:33,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:41:33,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:41:33,872 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:41:33,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:33,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:41:33,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:41:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:33,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:41:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:34,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780141279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:41:34,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:41:34,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-24 01:41:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659816040] [2024-11-24 01:41:34,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:41:34,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:41:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:34,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:41:34,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:41:34,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:34,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1560 transitions, 39317 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:34,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:34,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:34,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:40,574 INFO L124 PetriNetUnfolderBase]: 5423/9051 cut-off events. [2024-11-24 01:41:40,574 INFO L125 PetriNetUnfolderBase]: For 479548/479548 co-relation queries the response was YES. [2024-11-24 01:41:40,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105057 conditions, 9051 events. 5423/9051 cut-off events. For 479548/479548 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57855 event pairs, 854 based on Foata normal form. 88/9139 useless extension candidates. Maximal degree in co-relation 104462. Up to 4451 conditions per place. [2024-11-24 01:41:40,908 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 919 selfloop transitions, 900 changer transitions 3/1823 dead transitions. [2024-11-24 01:41:40,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1823 transitions, 48824 flow [2024-11-24 01:41:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 01:41:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-24 01:41:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 194 transitions. [2024-11-24 01:41:40,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-11-24 01:41:40,910 INFO L175 Difference]: Start difference. First operand has 375 places, 1560 transitions, 39317 flow. Second operand 20 states and 194 transitions. [2024-11-24 01:41:40,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1823 transitions, 48824 flow [2024-11-24 01:41:48,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1823 transitions, 48218 flow, removed 209 selfloop flow, removed 14 redundant places. [2024-11-24 01:41:48,496 INFO L231 Difference]: Finished difference. Result has 394 places, 1669 transitions, 45442 flow [2024-11-24 01:41:48,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38731, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=45442, PETRI_PLACES=394, PETRI_TRANSITIONS=1669} [2024-11-24 01:41:48,498 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2024-11-24 01:41:48,498 INFO L471 AbstractCegarLoop]: Abstraction has has 394 places, 1669 transitions, 45442 flow [2024-11-24 01:41:48,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:48,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:41:48,498 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:41:48,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:41:48,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:41:48,699 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:41:48,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:41:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash -788823274, now seen corresponding path program 11 times [2024-11-24 01:41:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:41:48,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817836135] [2024-11-24 01:41:48,700 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:41:48,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:41:48,710 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:41:48,710 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:41:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:41:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:41:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817836135] [2024-11-24 01:41:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817836135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:41:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:41:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 01:41:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534312828] [2024-11-24 01:41:48,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:41:48,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:41:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:41:48,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:41:48,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:41:48,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:41:48,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1669 transitions, 45442 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:41:48,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:41:48,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:41:48,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:41:55,064 INFO L124 PetriNetUnfolderBase]: 5654/9414 cut-off events. [2024-11-24 01:41:55,064 INFO L125 PetriNetUnfolderBase]: For 607415/607415 co-relation queries the response was YES. [2024-11-24 01:41:55,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117214 conditions, 9414 events. 5654/9414 cut-off events. For 607415/607415 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 60348 event pairs, 252 based on Foata normal form. 10/9424 useless extension candidates. Maximal degree in co-relation 116619. Up to 8546 conditions per place. [2024-11-24 01:41:55,215 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1655 selfloop transitions, 122 changer transitions 7/1785 dead transitions. [2024-11-24 01:41:55,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1785 transitions, 52057 flow [2024-11-24 01:41:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:41:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:41:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-11-24 01:41:55,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-24 01:41:55,216 INFO L175 Difference]: Start difference. First operand has 394 places, 1669 transitions, 45442 flow. Second operand 9 states and 84 transitions. [2024-11-24 01:41:55,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1785 transitions, 52057 flow [2024-11-24 01:42:03,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1785 transitions, 51120 flow, removed 347 selfloop flow, removed 2 redundant places. [2024-11-24 01:42:03,078 INFO L231 Difference]: Finished difference. Result has 403 places, 1712 transitions, 46398 flow [2024-11-24 01:42:03,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44676, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46398, PETRI_PLACES=403, PETRI_TRANSITIONS=1712} [2024-11-24 01:42:03,080 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2024-11-24 01:42:03,080 INFO L471 AbstractCegarLoop]: Abstraction has has 403 places, 1712 transitions, 46398 flow [2024-11-24 01:42:03,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:03,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:42:03,080 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:42:03,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-24 01:42:03,080 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:42:03,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:42:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1340145536, now seen corresponding path program 12 times [2024-11-24 01:42:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:42:03,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213737770] [2024-11-24 01:42:03,081 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:42:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:42:03,088 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:42:03,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:42:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213737770] [2024-11-24 01:42:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213737770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188707844] [2024-11-24 01:42:03,190 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:42:03,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:03,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:42:03,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:42:03,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:42:03,242 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:42:03,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:03,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:42:03,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:42:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:03,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:42:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:42:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188707844] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:03,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:42:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 19 [2024-11-24 01:42:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253258011] [2024-11-24 01:42:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:42:03,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:42:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:42:03,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:42:03,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:42:03,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:42:03,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1712 transitions, 46398 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:03,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:42:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:42:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:42:09,746 INFO L124 PetriNetUnfolderBase]: 5741/9535 cut-off events. [2024-11-24 01:42:09,747 INFO L125 PetriNetUnfolderBase]: For 582158/582158 co-relation queries the response was YES. [2024-11-24 01:42:09,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116412 conditions, 9535 events. 5741/9535 cut-off events. For 582158/582158 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61351 event pairs, 1804 based on Foata normal form. 6/9541 useless extension candidates. Maximal degree in co-relation 115814. Up to 8604 conditions per place. [2024-11-24 01:42:09,890 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1647 selfloop transitions, 140 changer transitions 7/1795 dead transitions. [2024-11-24 01:42:09,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1795 transitions, 52204 flow [2024-11-24 01:42:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:42:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:42:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-11-24 01:42:09,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-11-24 01:42:09,891 INFO L175 Difference]: Start difference. First operand has 403 places, 1712 transitions, 46398 flow. Second operand 8 states and 79 transitions. [2024-11-24 01:42:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1795 transitions, 52204 flow [2024-11-24 01:42:17,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1795 transitions, 52095 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-11-24 01:42:17,381 INFO L231 Difference]: Finished difference. Result has 412 places, 1755 transitions, 47980 flow [2024-11-24 01:42:17,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=46254, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=47980, PETRI_PLACES=412, PETRI_TRANSITIONS=1755} [2024-11-24 01:42:17,383 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2024-11-24 01:42:17,383 INFO L471 AbstractCegarLoop]: Abstraction has has 412 places, 1755 transitions, 47980 flow [2024-11-24 01:42:17,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:17,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:42:17,383 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:42:17,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:42:17,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:17,587 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:42:17,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:42:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1092157842, now seen corresponding path program 13 times [2024-11-24 01:42:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:42:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258575030] [2024-11-24 01:42:17,588 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:42:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:42:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:42:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:42:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258575030] [2024-11-24 01:42:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258575030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572280774] [2024-11-24 01:42:17,703 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:42:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:42:17,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:42:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:42:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:42:17,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:42:17,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:42:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:17,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:42:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572280774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:42:17,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:42:17,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-24 01:42:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622315711] [2024-11-24 01:42:17,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:42:17,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:42:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:42:17,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:42:17,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:42:18,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:42:18,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1755 transitions, 47980 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:18,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:42:18,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:42:18,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:42:25,638 INFO L124 PetriNetUnfolderBase]: 6086/10140 cut-off events. [2024-11-24 01:42:25,638 INFO L125 PetriNetUnfolderBase]: For 651846/651846 co-relation queries the response was YES. [2024-11-24 01:42:25,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126456 conditions, 10140 events. 6086/10140 cut-off events. For 651846/651846 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 66067 event pairs, 79 based on Foata normal form. 62/10202 useless extension candidates. Maximal degree in co-relation 125853. Up to 4363 conditions per place. [2024-11-24 01:42:25,802 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 967 selfloop transitions, 1035 changer transitions 1/2004 dead transitions. [2024-11-24 01:42:25,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2004 transitions, 57628 flow [2024-11-24 01:42:25,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-24 01:42:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-24 01:42:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 215 transitions. [2024-11-24 01:42:25,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-11-24 01:42:25,804 INFO L175 Difference]: Start difference. First operand has 412 places, 1755 transitions, 47980 flow. Second operand 25 states and 215 transitions. [2024-11-24 01:42:25,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2004 transitions, 57628 flow [2024-11-24 01:42:34,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2004 transitions, 57454 flow, removed 64 selfloop flow, removed 1 redundant places. [2024-11-24 01:42:34,696 INFO L231 Difference]: Finished difference. Result has 448 places, 1834 transitions, 54203 flow [2024-11-24 01:42:34,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=47619, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=54203, PETRI_PLACES=448, PETRI_TRANSITIONS=1834} [2024-11-24 01:42:34,697 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 425 predicate places. [2024-11-24 01:42:34,697 INFO L471 AbstractCegarLoop]: Abstraction has has 448 places, 1834 transitions, 54203 flow [2024-11-24 01:42:34,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:34,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:42:34,698 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:42:34,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:42:34,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:34,898 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:42:34,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:42:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash -212740450, now seen corresponding path program 14 times [2024-11-24 01:42:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:42:34,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332704333] [2024-11-24 01:42:34,899 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:42:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:42:34,906 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:42:34,906 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:42:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332704333] [2024-11-24 01:42:35,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332704333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288806963] [2024-11-24 01:42:35,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:42:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:42:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:42:35,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:42:35,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3316e60-4a2e-4892-93dd-206e452fe7c2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:42:35,078 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:42:35,078 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:42:35,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:42:35,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:42:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:42:35,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:42:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:42:35,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288806963] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:42:35,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:42:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 19 [2024-11-24 01:42:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219647403] [2024-11-24 01:42:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:42:35,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:42:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:42:35,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:42:35,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:42:35,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:42:35,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1834 transitions, 54203 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:42:35,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:42:35,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:42:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:42:43,504 INFO L124 PetriNetUnfolderBase]: 6630/11008 cut-off events. [2024-11-24 01:42:43,504 INFO L125 PetriNetUnfolderBase]: For 843963/843963 co-relation queries the response was YES. [2024-11-24 01:42:43,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147945 conditions, 11008 events. 6630/11008 cut-off events. For 843963/843963 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 72912 event pairs, 1872 based on Foata normal form. 12/11020 useless extension candidates. Maximal degree in co-relation 147324. Up to 9011 conditions per place. [2024-11-24 01:42:44,002 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1730 selfloop transitions, 265 changer transitions 5/2001 dead transitions. [2024-11-24 01:42:44,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 2001 transitions, 63360 flow [2024-11-24 01:42:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:42:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:42:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-11-24 01:42:44,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-11-24 01:42:44,003 INFO L175 Difference]: Start difference. First operand has 448 places, 1834 transitions, 54203 flow. Second operand 7 states and 73 transitions. [2024-11-24 01:42:44,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 2001 transitions, 63360 flow